KR102077521B1 - A cooling tower in which a filler is formed in multiple stages and a cooling water mixing section is provided between the fillers - Google Patents

Abstract

The present invention provides a cross flow type cooling tower and, more specifically, to a cooling tower in which fillers are installed in multiple stages, and cooling water is mixed between the fillers, thereby increasing heat exchange efficiency. Unit filters are installed in multiple stages in the cooling tower, and a mixing unit in which the cooling water is mixed between the unit fillers is installed to mix the cooling water which has passed through one unit filler. Therefore, the cooling water at predetermined temperature can be supplied to the unit filler installed below the mixing unit to increase heat exchange efficiency.

Description

Cooling tower in which a filler is formed in multiple stages and a cooling water mixing section is provided between the fillers}

The present invention relates to a multi-stage cross-flow cooling tower, and more particularly, a filler is provided in multiple stages, and is provided with a configuration for mixing the cooling water between each filler to improve the heat exchange efficiency.

In general, the cooling tower directly cools the heat generated by the plant's production process or the various mechanical devices used in the plant to water in a water-cooled heat exchanger, and directly receives air from the various types of machinery to reuse the warmed water. Or it refers to a heat exchange device for cooling the heated water by indirect contact.

Cooling tower is divided into counterflow cooling tower and crossflow cooling tower according to the flow of air and water. The crossflow cooling tower passes through louvers installed on both sides of the cooling tower, and the horizontally moving air and the vertically moving water cross each other at right angles for heat exchange. Most widely used.

In order to improve the cooling efficiency, a filler is installed inside the cooling tower, which determines the cooling efficiency of the cooling tower. Cooling tower fillers are generally formed in a filler assembly having a structure in which a plurality of plate-shaped fillers are stacked and installed in a cooling tower.

Therefore, the filler should be evenly distributed down and flowing down the hot coolant sprayed from the upper part of the filler by the injection nozzle, while allowing the air entering through the louver to move through the louver. It is preferably formed to have a long structure so that it can be in contact with the high temperature cooling water for a long time.

However, the coolant located near the louver of the coolant flowing down the filling material of the crossflow cooling tower drops by the outside air, and the coolant far away from the louver does not fall below the coolant located near the louver so that the coolant moves in the same filling. There is a problem that a difference in heat exchange efficiency occurs depending on the distance to the louver even if the heat exchanger with the heat exchanger and the need for a cooling tower to maintain a constant temperature of the cooling water moving in the filling material has emerged.

1. Republic of Korea Patent Publication No. 10-1128668 ("Structure of multi-stage installation cooling tower", 2012.03.14.)

The present invention has been made in order to solve the above problems, an object of the present invention is to install a unit filler in multiple stages inside the cooling tower, and to install a single unit filler by mixing the cooling water mixed between each unit filler It is to provide a cooling tower to increase the heat exchange efficiency by mixing the cooling water passed through and supplying the cooling water of a constant temperature to the unit filler installed under the mixing unit.

The cooling tower of the present invention is formed in multiple stages and the cooling water mixing unit is provided between the fillers, the airflow suction unit is formed in the cross-flow cooling tower, the lower portion of the cooling tower to introduce air into the cooling tower; A nozzle installed at an upper portion of the cooling tower to spray cooling water into the cooling tower; A filler including a plurality of unit fillers at predetermined intervals along a height direction of the cooling tower, and configured to exchange heat between the air and the coolant; And a fan installed at the top of the cooling tower to discharge the heat-exchanged air to the outside. The fan is formed between the unit fillers and is formed in a water tank shape having an area corresponding to the bottom surface area of the unit fillers. An intermediate channel having a plurality of holes formed at a bottom thereof to receive coolant from a unit filler located in the coolant and to redistribute the coolant to a unit filler located at a lower portion thereof; And a coolant accommodating part installed at an upper portion of the intermediate channel, and having a slope formed on an inner surface of the tank having an area corresponding to an area of the bottom surface of the unit filling material, or having a cross-sectional area narrowing downward. And a mixing part including a supply pipe extending downward along a circumference of a hole formed in at least one bottom of the cooling water accommodating part, wherein the cooling water accommodating part is located in the upper portion of the cooling tower. The low temperature coolant and the high temperature coolant supplied to the coolant accommodating part are stored for a predetermined time. Is mixed during the process and the intermediate Furnace exits the cooling tower, characterized in that for supplying the cooling water of a constant temperature mixing in the cooling water receiving section in the unit filling material located in the lower portion.
In addition, the coolant accommodating portion is characterized in that the inclination is formed on the inner surface is narrowed toward the bottom, the bottom surface is formed in a plane so that the coolant contained in the coolant accommodating portion can be stored for a predetermined time. .

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In addition, the coolant receiving portion, characterized in that the inclination is formed on the inner surface becomes narrower toward the bottom, characterized in that irregularities are formed on the inclined surface.

The supply pipe may include a first supply pipe receiving coolant from the cooling water receiving unit and a second supply pipe installed at an end of the first supply pipe to receive coolant from the first supply pipe and to supply the cooling water to the intermediate water channel. The diameter of the second supply pipe is characterized in that larger than the diameter of the first supply pipe, the bottom surface of the coolant receiving portion is characterized in that the cooling water accommodated in the coolant receiving portion can be stored for a predetermined time.

The cooling tower provided with the cooling water mixing unit of the present invention having the above configuration has the effect of providing a cooling tower having a high heat exchange efficiency by supplying cooling water having the same temperature to the unit filler.

1 is a schematic diagram of a conventional multi-stage cross-flow cooling tower
2 is a schematic view of a multi-stage cross-flow cooling tower according to an embodiment of the present invention.
Figure 3 is an illustration of the operation of the mixing section of the multi-stage cross-flow cooling tower according to an embodiment of the present invention
Figure 4 is an exemplary operation of the mixing section of the multi-stage cross-flow cooling tower according to an embodiment of the present invention
5 is a front view of the mixing portion of the multi-stage cross flow cooling tower according to various embodiments of the present disclosure.

Hereinafter, an embodiment of the present invention as described above will be described in detail with reference to the accompanying drawings.

Figure 1 shows a schematic diagram of a conventional multi-stage cross-flow cooling tower. As shown in FIG. 1, in the conventional multi-stage cross-flow cooling tower, unit fillers are spaced apart at predetermined intervals along the height direction of the cooling tower, and an intermediate channel 3 is provided between the unit fillers and includes a first unit filler located above. Coolant passing through 1) is supplied to the second unit filler (2) located below.

Assuming that the first unit filler 1 is divided into zones A, B, C, and D, zones A and B are supplied with cooling water at the same temperature from the cooling water injection nozzle. At this time, since zone A is relatively close to the outside of the cooling tower and zone B is located near the center of the cooling tower, the cooling water flowing from zone A to zone C may be cooled by outside air introduced into the cooling tower, but zone B is close to the outside of the cooling tower. It cools faster than the coolant flowing to zone D at. For this reason, although the cooling water temperature of zone A and zone B of the first unit filler 1 is the same, the cooling water temperature of zone D is higher than that of zone C.

After passing through the C and D zones, it is fed to the second unit filler material 2 via the intermediate channel 3. Similarly, when the second unit filler material 2 is divided into E, F, G, and H zones, the E zone receives coolant through the C zone and the F zone receives coolant through the D zone. At this time, since the E zone is relatively close to the outside of the cooling tower and the F zone is located near the center of the cooling tower, the cooling water flowing from the E zone to the G zone may be cooled by the outside air introduced into the cooling tower, but is close to the outside of the cooling tower. It cools faster than the cooling water flowing into the H zone at, and the temperature difference of the cooling water becomes larger.

At this time, the cooling water moving in the order of zone A → zone C → zone E → zone G becomes the same as the external temperature, so that the heat exchange efficiency of the zones A, C, E, and G decreases.

Multi-stage cross-flow cooling tower of the present invention is devised to solve the problems of the conventional multi-stage cross-flow cooling tower will be described in more detail with reference to FIGS.

2 shows a schematic diagram of a multi-stage cross-flow cooling tower according to one embodiment of the invention. As shown in FIG. 2, a fan 600 is installed at an upper portion of the cooling tower 10, and a plurality of unit fillers 100 are provided at predetermined intervals along a height direction of the cooling tower 10, and at a lower portion thereof. The reservoir 500 is installed. The outer surface of the cooling tower 10 is formed with an outside air suction unit 700 through which external air is introduced, and a nozzle 400 for supplying cooling water to the unit filler 100 is installed on the unit filler 100 located at the top thereof. have. Finally, the mixing unit 200 and the intermediate channel 300 which are the greatest features of the present invention are installed between the unit fillers 100.

Outside air flows in from the outside air suction unit 700 and high-temperature cooling water is supplied from the nozzle 400. Cooling water and external air pass through each unit filler material 100 to exchange heat. The outside air is exhausted to the outside by the fan 600 installed on the top of the cooling tower 10, the heat-exchanged cooling water is stored in the reservoir 500 under the cooling tower 10 is supplied to the external air conditioner.

At this time, each time the cooling water passes through one unit filler 100, the coolant is mixed in the mixing unit 200 installed at the lower portion of the unit filler 100 and supplied to the intermediate channel 300, and in the intermediate channel 300 The cooling water is then supplied to the unit filler 100. Detailed description of the mixing unit 200 will be described in more detail with reference to FIGS. 3 and 4.

Figure 3 shows an exemplary operation of the mixing section of the multi-stage cross-flow cooling tower according to an embodiment of the present invention. As shown in FIG. 3, the first unit filler 110 and the second unit filler 120 are installed, and the mixing unit 200 is disposed between the first unit filler 110 and the second unit filler 120. The intermediate channel 300 is installed. At this time, the reason why only two fillers are shown is for ease of explanation, the operator can easily change the number of fillers installed in the cooling tower in consideration of the working environment.

As shown in FIG. 3, the coolant injected from the nozzle 400 is supplied to the first unit filler 110. At this time, as in the conventional cooling tower, the temperature of the cooling water passing through the region located near the outside of the cooling tower 10 and the cooling water passing through the region located near the center of the cooling tower 10 are different.

 For ease of explanation, the cooling water passing through the region located near the outside of the cooling tower 10 is referred to as low temperature cooling water, and the cooling water passing through the region located near the center of the cooling tower 10 is referred to as high temperature cooling water. At this time, the criteria of high temperature and low temperature are relative. Before being supplied to the intermediate channel 300, the mixture passes through the mixing unit 200, and in the mixing unit 200, the high temperature coolant and the low temperature coolant are mixed and moved to the intermediate channel 300, and the coolant having a uniform temperature is filled in the second unit filler. Supplied to 120.

With reference to Figure 4 will be described in more detail the cooling water temperature change of the cross-flow cooling tower according to an embodiment of the present invention.

)는 27℃라고 가정한다.Figure 4 shows an example of the operation of the mixing section of the multi-stage cross-flow cooling tower according to an embodiment of the present invention. As shown in FIG. 4, the first unit filler 110 and the second unit filler 120 are floated at predetermined intervals along the height direction of the cooling tower 10 in the cooling tower 10. The mixing unit 200 and the intermediate channel 300 are installed between the 110 and the second unit filler 120. For convenience of description, the first unit filler 110 is divided into a, b, c and d zones, and the second unit filler 120 is divided into e, f, g and h zones to be described, and the nozzle ( The temperature of the cooling water supplied from 400 is 37 ° C., and the external temperature (

) Is assumed to be 27 ° C.

과

의 온도는 37℃이다. 그러나, a 구역에서 c 구역으로 이동하는 냉각수는 냉각탑(10) 외부와 가까이 위치하기 때문에 온도가 빠르게 떨어진다. 반면, b 구역에서 d 구역으로 이동하는 냉각수는 냉각탑(10)의 중앙 내부에 가까이 위치하기 때문에 온도가 천천히 떨어지게 되므로 c 구역에서 측정한 냉각수 온도

은 34℃이고, d 구역에서 측정한 냉각수 온도

는 36℃로 2℃의 온도 차이가 발생한다.Zones a and b receive coolant at 37 ° C from the nozzle 400

and

The temperature of is 37 ° C. However, since the coolant moving from zone a to zone c is located close to the outside of the cooling tower 10, the temperature drops quickly. On the other hand, since the coolant moving from zone b to zone d is located near the inside of the center of the cooling tower 10, the temperature slowly drops, so the coolant temperature measured in zone c is measured.

Is 34 ° C and the coolant temperature measured in zone d

A temperature difference of 2 ° C. occurs at 36 ° C.

는 35℃인다. 35℃의 냉각수는 중간 수로(300)로부터 제 2 단위 충전재(120)로 공급되며, e 구역의 온도

와 f 구역의 온도

은 35℃로 동일하다. 상기한 바와 같이 e 구역에서 g 구역으로 이동하는 냉각수는 냉각탑(10) 외부와 가까이 위치하기 때문에 온도가 빠르게 떨어진다. 반면, f 구역에서 h 구역으로 이동하는 냉각수는 냉각탑(10)의 중앙 내부에 가까이 위치하기 때문에 온도가 천천히 떨어지게 되므로 g 구역의 온도

은 32℃이고 h 구역의 온도

은 34℃로 온도 차이가 발생하나, 제 2 단위 충전재(120) 하부에 형성된 혼합부에서 혼합된 후 33℃의 동일한 온도의 냉각수를 제 3 단위 충전재(100)로 공급할 수 있다.The low temperature coolant passing through the zone c in the zone a and the high temperature coolant passing through the zone d in the zone b are moved to the mixing unit 200 and mixed, and then supplied to the intermediate channel 300 and supplied to the intermediate channel 300. Coolant temperature

Is 35 ° C. Cooling water at 35 ° C. is fed from the intermediate channel 300 to the second unit filler 120, the temperature of zone e

Temperature in zones and f

Is the same at 35 ° C. As described above, since the coolant moving from the e zone to the g zone is located close to the outside of the cooling tower 10, the temperature drops rapidly. On the other hand, the coolant moving from the f zone to the h zone is located close to the inside of the center of the cooling tower 10, so the temperature is slowly dropped, so the temperature of the g zone

Is 32 ° C and the temperature in zone h

The temperature difference occurs at 34 ° C., but after mixing in the mixing unit formed under the second unit filler 120, cooling water having the same temperature of 33 ° C. may be supplied to the third unit filler 100.

When the high temperature coolant and the low temperature coolant are not mixed as in the related art, the temperature of the coolant passing through the n-th unit filler is about 10 ° C., but in the cooling tower of the present invention, the mixing unit 200 for mixing the high temperature coolant and the low temperature coolant Since the temperature difference of the cooling water passing through the n-th unit filler is only about 2 ~ 3 ℃.

Therefore, it is preferable that the mixing unit 200 is formed to have a structure such that the high temperature cooling water and the low temperature cooling water are mixed well, and the shape of the mixing unit according to various embodiments will be described with reference to FIG. 5.

5 is a front view illustrating a mixing part of a multi-stage cross flow cooling tower according to various embodiments of the present disclosure. First, as shown in FIG. 5A, the inclined surface 210a may be formed in the mixing unit 200. In the case of the mixing part 200 shown in FIGS. 2 to 4, sludge is accumulated in the coolant at the corners in a rectangular shape and the movement of the coolant is not easy. However, when the inclined surface 210a is formed in the mixing part 200, since the low temperature coolant is supplied along the left inclined surface and the high temperature coolant is supplied along the right inclined surface to move to the intermediate water channel 300, sludge is accumulated by the coolant. This has the effect of solving the problem.

However, when the mixing part 200 is formed as shown in FIG. 5 (a), the coolant may not move properly and may move to the intermediate water channel 300, and as shown in FIG. 5 (b), the inclined surface ( 210b) may be formed, and the horizontal surface 220b may be formed so that the high temperature cooling water and the low temperature cooling water may be temporarily stored and mixed.

As shown in FIG. 5C, the inclined surface is formed in the mixing part 200, and the uneven surface 210c may be formed on the surface of the inclined surface. The coolant passing through the unit filler 100 may collide with the uneven surface 210c formed on the inclined surface, and sludge included in the coolant may be separated from the coolant. In particular, the mixing unit 200 according to the embodiment of Figure 5 (c) is preferably located at the bottom of the unit filler 100 located at the bottom. The coolant that has passed through the unit filler material 100 located at the bottom moves to the reservoir 500, and the coolant temporarily stored in the reservoir 500 is supplied to the external air conditioner. In this case, when sludge is included in the cooling water supplied to the air conditioning apparatus, the performance of the air conditioning apparatus may be degraded. Therefore, the mixing unit 200 having the uneven surface 210c formed on the lower portion of the unit filler 100 located at the bottom is installed. Thus, the sludge contained in the cooling water may be partially removed.

Finally, as shown in (d) of FIG. 5, the diameter of the supply pipe formed at the lower portion of the mixing unit 200 and supplying the mixed cooling water to the intermediate channel 300 may be different. When the upper part of the supply pipe is referred to as the first flow path 210d and the lower part as the second flow path 220d, the diameter of the first flow path 210d is narrowed and the diameter of the second flow path 220d is defined as the first flow path 210d. It may be formed to be larger so that the high temperature coolant and the low temperature coolant are mixed while passing through the first flow path 210d, passed through the second flow path 220d, and easily supplied to the intermediate water channel 300.

The technical spirit should not be interpreted as being limited to the above embodiments of the present invention. Various modifications may be made at the level of those skilled in the art without departing from the spirit of the invention as claimed in the claims. Therefore, such improvements and modifications fall within the protection scope of the present invention, as will be apparent to those skilled in the art.

10 cooling tower
100 fillings
110 1st Unit Filling Material
120 2nd Unit Filling Material
200 mixing parts
210a, 210b slope
220b horizontal
210c uneven surface
210d first supply line
220d 2nd supply line
300 medium channel
400 nozzles
500 reservoir
600 fans
700 Fresh air intake

Claims (7)

In the cross flow cooling tower,
An outside air suction unit formed at a lower portion of the cooling tower to introduce air into the cooling tower;
A nozzle installed at an upper portion of the cooling tower to spray cooling water into the cooling tower;
A filler including a plurality of unit fillers at predetermined intervals along a height direction of the cooling tower, and configured to exchange heat between the air and the coolant; And
A fan installed at the top of the cooling tower to discharge heat exchanged air to the outside;
Including;
It is formed between the unit fillers, and formed in the shape of a water tank having an area corresponding to the bottom area of the unit fillers, and receives coolant from the unit fillers located in the upper portion to redistribute the coolant to the unit fillers located in the lower portion. An intermediate channel in which a plurality of holes are formed; And
Cooling water accommodating portion is installed in the upper portion of the intermediate channel, formed in the form of a tank having an area corresponding to the bottom surface area of the unit filling material or inclined is formed in the form that the cross-sectional area narrows toward the bottom, And a mixing part including a supply pipe extending in a downward direction along a circumference of at least one hole formed in a bottom surface of the cooling water receiving part.
Including;
The coolant accommodating unit receives low temperature coolant moved along a filler portion located near the outer wall of the cooling tower and high temperature coolant moved along the filler portion located far from the outer wall of the cooling tower from the unit filler located at the upper portion, and the coolant accommodating portion The low temperature coolant and the high temperature coolant supplied to the gas are mixed while being stored for a predetermined time, and are discharged into the intermediate channel through the supply pipe to supply a constant temperature of the coolant mixed in the coolant accommodating part to the unit filler located in the lower portion. Cooling tower, characterized in that.
delete delete delete The method of claim 1, wherein the coolant receiving portion,
Cooling tower, characterized in that the inclination is formed on the inner surface is narrowed toward the bottom, the bottom surface is formed in a plane so that the cooling water stored in the cooling water receiving portion can be stored for a predetermined time.
The method of claim 1, wherein the coolant receiving portion,
Cooling tower, characterized in that the inclination is formed on the inner surface is narrowed toward the bottom, the irregularities formed on the inclined surface.
The method of claim 1, wherein the supply pipe,
A first supply pipe receiving coolant from the coolant receiving unit and a second supply pipe installed at an end of the first supply pipe to receive coolant from the first supply pipe and to supply the cooling water to the intermediate water channel;
Characterized in that the diameter of the second supply pipe is larger than the diameter of the first supply pipe, the bottom surface of the cooling water receiving portion is formed in a plane so that the cooling water stored in the cooling water receiving portion can be stored for a predetermined time .

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